Electric Moulded Case Circuit Breaker

Electric Moulded Case Circuit Breaker is a kind of electrical equipment with protection functions such as overload, short circuit and under voltage. Its working principle is that under normal operating conditions, the circuit breaker is in a closed state, when the circuit overload, short circuit or under voltage and other faults, the circuit breaker will automatically disconnect the circuit, so as to protect the circuit and the safety of the equipment.

Model:STM1-250L

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Product Description

Model		STM1-125			STM1-250			STM1-400			STM1-630			STM1-800			STM1-1250
Rated Cortirucus curert		125			250			400			630			800			1250
Rated Curert hn(A)		16,20,25,32,40.50			100,125,140,160,			250,315,350,400			400,500,630			630,700,800			80,010,001,250
		63,80,100,125			180,200,225.25
Rated Operating Votage Ue(V)DC								500,550,7			501,000
Rated Isuation Votage UKV)		1000			1000			1500			1500			1500			1500
Uimp(KV)
Test Votage One Miute(V)		3500			3500			3500			3500			3500			3500
Breaking Capacity (KA)		L	M	H	L	M	H	L	M	H	L	M	H	L	M	H	L	M	H
ku(1cs=75%ku)	250V	25	35	50	35	50	65	35	50	65	35	50	65	50	65	80	50	65	80
	500V	25	25	50	35	35	65	35	35	65	35	35	65	50	50	80	50	50	80
	750V	25	15	50	35	25	65	35	25	65	35	25	65	50	35	80	50	35	80
	1000V	25	10	50	35	15	65	35	15	65	35	15	65	50	20	80	50	20	80
Mechaarical He	Times	7000			7000			4000			4000			2500			2000
Electric Life	Times	2000			2000			1000			1000			800			600
Breaking Times(ms)		20			20			20			20			20			20
Installation Location		Any place
bolator capacity		yes
Standard		IEC 60947-2,IEC60947-1,GB 14048,GB 14048-2
Temperature(C)		25℃-50℃
Protection Degress		b20
Accessory		OF/SD/MX
Arcing Distance(mm)		250

Model NO.	STM1-250L/3300
Arc-extinguishing Medium	Air
STANDARD:	IEC 60947-2
Structure	MCCB
Type	Moulede case Circuit Breaker
Certification	CE
Approvals	CE,ISO9001
Delivery Time	Within 20days
Specification	63A-630A
Origin	Wenzhou Zhejiang
Production Capacity	2000pieces/Week
Speed	Normal Type Circuit Breaker
Installation	Fixed
Poles Number	3P 4P
Function	Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
Price	Factory Price
Warranty Time	12months
Transport Package	Inner Box/Carton
Trademark	SONTUOEC,WZSTEC,SONTUNE,IMDEC
HS Code	8536200000

Structure and characteristics

Structure: electric molded case circuit breaker usually consists of contact system, arc extinguishing system, operating mechanism, striker, and shell and other parts.

Features:

It has high breaking capacity and good dynamic thermal stability.

The shell is made of flame-retardant, arc-resistant insulating material, with high safety performance.

The operating mechanism is flexible and reliable, which is convenient for users to operate manually or electrically.

The disconnector has a variety of protection functions, and can carry out corresponding actions according to different faults of the circuit.

Function and use

Function: Electric molded case circuit breaker has various protection functions such as overload protection, short circuit protection, under voltage protection and leakage protection. Among them, overload protection means that when the circuit is overloaded, the circuit breaker can automatically disconnect the circuit to prevent the equipment from being damaged due to overheating; short-circuit protection means that when a short-circuit occurs in the circuit, the circuit breaker can quickly cut off the fault current to prevent fire and other safety accidents; undervoltage protection means that when the power supply voltage is lower than the rated value, the circuit breaker can automatically disconnect the circuit to protect the equipment from being damaged; and leakage protection means that when a leakage occurs in the circuit, the circuit breaker can timely cut off the power supply to protect personal safety. Leakage protection means that the circuit breaker can cut off the power supply in time when there is leakage in the circuit to protect personal safety.

Uses: Electric molded case circuit breakers are widely used in electrical systems in residential, commercial, industrial and transportation fields. In the residential field, it is used to protect the safety of home circuits and electrical equipment; in the commercial field, it is used to protect the electrical systems of large buildings and commercial premises; in the industrial field, it is used to control and protect the safe operation of factory equipment and machines; in the transportation field, it is used to protect the stable operation of traffic lights, railroad signals and other equipment.